Sawdust as insulation

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chrisg1979

chrisg1979

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Anyone come across this before?

Just lifted a board on the first day of a job to be faced with five inches of sawdust between the ground and first floor.

It’s everywhere too, not concentrated to one area.

EAE18F99-7571-4F26-9E6D-D829A1174463.jpeg

 
Last edited by a moderator:
Clinker is the a small rough rock like substance that is what is left when you burn coal and is not the ash. I always presumed it was non combustible impurities in the coal. There is plenty of older houses near me that has clinker in the floorboard voids as there used to be a coal fired power here, and clinker was a by product from there.

 
roys said:
Clinker is the a small rough rock like substance that is what is left when you burn coal and is not the ash. I always presumed it was non combustible impurities in the coal. There is plenty of older houses near me that has clinker in the floorboard voids as there used to be a coal fired power here, and clinker was a by product from there.
Click to expand...
Cheers 👍🏻
Not too sure about the ‘non combustible’ qualities of sawdust! 💥 

Or the insulation implications should cables have to run through the stuff!

 
If its sawdust I'd be worried if it were my house to be honest .     Imagine an arcing terminal in an underfloor JB ?  

Wasn't Vermiculite bigger  & very lightweight  granules   or was that something else. ?  

 
You’re not thinking this through. Certainly I’ll clear that for you,- bag it up and sell to local pet shop for animal bedding, what a sideline cash and not related to main income so will never get caught out!! 

 
I brought it to the attention of the client and voiced my concerns about it.

Her builder came round last night and is going to take up all the floors and remove the lot!

Its definitely sawdust, I’ve just had to remove a couple of bin liners full!

 
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If it is just normal sawdust I would have been just as worried about any damp  and moisture being absorbed by it. A dripping pipe joint could accumulate a very damp patch of sawdust surrounding it.  Bet the mice love it for making nests in.

Doc H. 

 

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